Условие: Write a program that enters the coefficients a, b and c of a quadratic equation a*x2 + b*x + c = 0 and calculates and prints its real roots. Note that quadratic equations may have 0, 1 or 2 real roots.

Условие: Write a program that, depending on the user’s choice inputs int, double or string variable. If the variable is integer or double, increases it with 1. If the variable is string, appends “*” at its end. The program must show the value of that variable as a console output. Use switch statement.

Условие: Write a program that applies bonus scores to given scores in the range [1..9]. The program reads a digit as an input. If the digit is between 1 and 3, the program multiplies it by 10; if it is between 4 and 6, multiplies it by 100; if it is between 7 and 9, multiplies it by 1000. If it is zero or if the value is not a digit, the program must report an error.
Use a switch statement and at the end print the calculated new value in the console.